<template>
  <div>
    <div v-show="flag">全场清仓，全部5折</div>


     <ul v-for="item in goods" :key="item.name">
        <li>
            <div>{{item.name}}</div>
            <div>{{item.price*item.discount}}</div>
            <div>折扣：{{(item.discount*100)+"%"}}</div>
        </li>
     </ul>
     <button @click="fn">点击开启折扣</button>
   </div>
</template>
 
<script>
export default {

  data() {
    return {
        goods:[
            {
                name:'mac电脑',
                price:'15000',
                discount:1
            },
            {
                name:'百事可乐',
                price:'3',
                discount:1
            },
            {
                name:'保温杯',
                price:'99',
                discount:1
            },
            {
                name:'保暖手套',
                price:'130',
                discount:1
            },
        ],
        flag:false

    }
  },
  computed: {},

  methods: {
    fn(){
      this.flag=!this.flag
      this.goods.forEach(item=>item.discount=0.5)
    }
  }
};
</script>

<style scoped>
ul {
    margin: 0;
    padding: 0;
}

li {
    list-style: none;
    width: 200px;
    height: 80px;
    padding:10px 0 0 0 ;
    border: 2px solid #333;
}
</style>